Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire, it being understood that the tread portion repeats uniformly throughout the circumference of the tire, showing my new design;

FIG. 2 is a front elevational view thereof, the top plan view and bottom plan view being identical thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is an enlarged fragmentary front view thereof; and,

FIG. 7 is a cross-sectional view thereof taken along the line 7—7 in FIG. 6.

The elements shown in broken lines are for illustrative purposes only and form no part of the claimed design.

In the drawings, the stippled surface shading represents the recessed portion of the tread grooves, having the depth and configuration shown in FIG. 7. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 